using System.Net.Http;
using System.Threading.Tasks;

namespace LanguageFeatures.Models
{
  public class MyAsyncMethods
  {
    public async static Task<long?> GetPageLength()
    {
      HttpClient client = new HttpClient();
      var httpMessage = await client.GetAsync("http://apress.com");
      return httpMessage.Content.Headers.ContentLength;
    }
  }
}
